Hi guys, I'm new here and a noob at connecting speakers or pretty much anything audio related so I need some help. I got some Logitech X-540 speakers which I dont know what goes where on my tv. I only have the rca, hdmi and optical on my tv, but the wires coming from the speakers are the black, green and a brown one (which are the font, rear and center sub, may not be in that order). Is there a converter that I need to get? I read about some sort of receiver but I then got confused. I appreciate any help you can give me, thank you for your time.